All's well that ends well in the conclusion of Stable Boy when Wyngate realises that Cody, and not Benny, is the one responsible for ill-treating Thunderboy.
But that is not the end of the revengeful Cody. He puts a sharp object in Thunderboy's saddle resulting in Steel being thrown off his horse and hurting himself.
Then he asks Wyngate's rival, Fieldney, to challenge the former to a race in which Thunderboy is to be the prize.
To make doubly sure Wyngate loses the race, Cody kidnaps Benny who has been appointed jockey because of Steel's indisposition.